Yes! you can register .in domains instantly and there is no documents required for this.

Is there any minimum or maximum period for the domain name?

Yes! you can register a domain name from 1 year to 10 years.

What is meant by "Register" a Domain name?

It means that when you are registering this name, this name belongs to you for the period you have registered with any company.

What happens if i dont renew a domain name?

If you do not renew a domain name you still have got a grace period of 45 days to renew a domain name, but if you fail after this period then the domain name goes off into redemption period and its there in redemption period for a period of 30 days, and then it comes to available of registration.

How can i decide with whom i can register the domain name?

You can have a look of the reviews of the company or the existence of the company and that gives u the best idea of booking a website with a company.

Can i Move out my domain name or Transfer a Domain name to another Registrar/ Hosting Company?

Yes! you can move out any a time from one registrar to another by initiating a Transfer request, you would need to get a Domain Secret Key and then initiate a Transfer request, it generally takes 5 to 7 working days for a domain name to get transferred.
Note: While a Transfer is Initated the domain status should be Active.

The domain name which i am looking for is not available?

If the domain you are looking for is not available then we advice you to go for an alternative name.

How can i pay for Domain name Registration / Renewal / Transfer

You can pay via Paypal, Credit Card, Western Union or Any Indian Banks or even you can make a wire Transfer.

Once i register a domain name can i change it later?

If it is in a grace period which is 4 days of registration, there would be a cancellation fee of $1 and you can register a fresh domain name, but after that it is not possible.